Elon Musk’s The Boring Company has completed construction of its 2-mile-long test tunnel beneath Los Angeles. It was bbuilt to test the viability of an underground transport concept, and will be opened to the public on December 10, complete with complimentary rides. For those who haven’t been following the company, Musk was also given the green-light to build a Hyperloop system in the District of Columbia in Washington D.C. earlier this year. Continue reading to watch the full time-lapse walkthrough video that Elon Musk Tweeted earlier this week.

“In June, The Boring Company was awarded a contract to build a Loop system between Chicago O’Hare Airport and downtown. Unlike the Hyperloop, Musk’s Loop system doesn’t ferry passenger at speeds of over 700 mph (1126 km/h) in vacuum tubes but is instead made up of 16-passenger sleds that travel in tunnels at roughly 100 mph (160 km/h),” reports Car Scoops.